Figure 4.

Schematic representation of the implanted electrodes and recorded signals. (A) Two bipolar stimulating electrodes (OB1 and OB2) were implanted in the ventral mitral cell layer of the olfactory bulb (OB). Four monopolar recording electrodes were implanted, respectively, in the anterior piriform cortex (aPC), posterior piriform cortex (pPC), lateral entorhinal cortex (LEC), and dentate gyrus (DG). (B) An example of the evoked field potential signals induced in the four recording sites in response to stimulation of the OB. The amplitude (A_mV) and latency (L_ms) of the evoked potential late component were measured in each site, as indicated on the figure. (St,) stimulation artifact.